package com.ynny.chapter14train.service;

import com.ynny.chapter14train.pojo.Users;

import java.util.List;


public interface UsersService {
    // 查询所有用户
    List<Users>  selectAll(Users users);
    // 添加用户
    List<Users>  insert(Users users);
    int register(Users users);

    boolean login(String username, Integer password);

}
